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Opt Lett. 2010 Nov 1;35(21):3700-2. doi: 10.1364/OL.35.003700.

Compact wavelength-insensitive fabrication-tolerant silicon-on-insulator beam splitter.

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  • 1Institut d'Electronique Fondamentale, Université Paris-Sud, CNRS, 91405 Orsay, France.


A star coupler-based beam splitter for rib waveguides is reported. A design method is presented and applied in the case of silicon-on-insulator rib waveguides. Experimental results are in good agreement with simulations. Excess loss lower than 1 dB is experimentally obtained for star coupler lengths from 0.5 to 1 μm. Output balance is better than 1 dB, which is the measurement accuracy, and broadband transmission is obtained over 90 nm.

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